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SubjectRe: [PATCH -tip] x86: do_boot_cpu - check if we have ESR register

* Cyrill Gorcunov <gorcunov@gmail.com> wrote:

> We should touch ESR register if only we have it.
> The patch fixes the problem mentoined here
>
> http://lkml.org/lkml/2008/10/17/147
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
> CC: Glauber Costa <glommer@gmail.com>

> - apic_write(APIC_ESR, 0);
> - apic_read(APIC_ESR);
> + if (APIC_INTEGRATED(apic_version[phys_apicid])) {
> + apic_write(APIC_ESR, 0);
> + apic_read(APIC_ESR);
> + }

i'm wondering - is the server there really that old, that it has no
integrated lapic? I.e. it's an i486 SMP box or so? Or perhaps some
other, weird SMP box?

Ingo


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